1986 Merc 35 - Question on a noise

Scooch_2

Petty Officer 2nd Class
Joined
Aug 5, 2002
Messages
145
I have a Merc 35 that runs great. It makes a dieseling noise after I slow down after running WOT for a little while. If I give it more gas and speed back up, the noise goes away. After I slow doen, the noise continues for 15-20 seconds and goes away. Is this normal, or something I should check out.
 

Trent

Captain
Joined
Nov 17, 2001
Messages
3,333
Re: 1986 Merc 35 - Question on a noise

Some two strokes at midrange throttle position dont run real smooth. Your hearing what I call "four stroking".
 
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